Isle of Anglesey — county
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 19,854
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 19,787
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 19,779
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 19,515
- Group
- Molluscs
- Peak month
- June
- Records since 2000
- 18,892
- Group
- Birds
- Peak month
- January
- Records since 2000
- 18,878
- Group
- Dragonflies and damselflies
- Peak month
- July
- Records since 2000
- 18,845
- Group
- Caddisflies
- Peak month
- September
- Records since 2000
- 18,706
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 18,559
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 18,442
- Group
- Butterflies and moths
- Peak month
- August
- Records since 2000
- 18,372
- Group
- Mosses
- Peak month
- November
- Records since 2000
- 18,165
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 18,107
- Group
- Fish
- Peak month
- July
- Records since 2000
- 18,003
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 17,871
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 17,847
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 17,704
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 17,587
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 17,584
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 17,492
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 17,406
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 17,268
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 17,033
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 16,933
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 16,907
- Group
- Grasshoppers and crickets
- Peak month
- July
- Records since 2000
- 16,828
- Group
- Birds
- Peak month
- June
- Records since 2000
- 16,591
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 16,454
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 16,059
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 15,904
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 15,831
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 15,745
- Group
- Ferns and horsetails
- Peak month
- May
- Records since 2000
- 15,670
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 15,556
- Group
- True flies
- Peak month
- April
- Records since 2000
- 15,504
- Group
- Crustaceans
- Peak month
- August
- Records since 2000
- 15,388
- Group
- True flies
- Peak month
- August
- Records since 2000
- 15,338
- Group
- Flowering plants
- Peak month
- June
- Records since 2000
- 15,205
- Group
- Flowering plants
- Peak month
- April
- Records since 2000
- 15,116
- Group
- Bryozoans
- Peak month
- August
- Records since 2000
- 14,805
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 14,629
- Group
- Bryozoans
- Peak month
- June
- Records since 2000
- 14,544
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 14,503
- Group
- Flowering plants
- Peak month
- July
- Records since 2000
- 14,496
- Group
- Mosses
- Peak month
- March
- Records since 2000
- 14,229
- Group
- True flies
- Peak month
- June
- Records since 2000
- 14,206
- Group
- Butterflies and moths
- Peak month
- June
- Records since 2000
- 14,180
- Group
- True flies
- Peak month
- April
- Records since 2000
- 14,120